code: def selectDegrees(
      degree_root, index_left, index_right, degree_left, degree_right
  ):
      """
      Select the which degree to be next step.
      """
  
      if index_left == -1:
          degree_now = degree_right
      elif index_right == -1:
          degree_now = degree_left
      elif abs(degree_left - degree_root) < abs(
          degree_right - degree_root
      ):
          degree_now = degree_left
      else:
          degree_now = degree_right
  
      return degree_now
  
imports: import argparse
  import math
  import random
  import numpy
  import pgl
  from pgl import graph
  from pgl.graph_kernel import alias_sample_build_table
  from pgl.sample import alias_sample
  from data_loader import EdgeDataset
  from classify import train_lr_model
  from sklearn_classify import train_lr_l2_model
label_desc: Use image node_id 1 for calling a global function with example usage: selectDegrees(degree_root, index_left, index_right, degree_left, degree_right) and returns: degree_now